Basic Arithmetic Road Signs (BARS) help
learners of math become equationeers -- finders of equations.
BARS were started as part of a Learning About Math resource that used
road tripping as a theme. A road sign becomes a BARS when the numbers
in the sign are used to find an equation. In a nutshell, each number
in the sign must be used and each number can be used only once.
When searching for equations, math functions can be used on the
numbers found in a sign (e.g. sqrt(n), cuberoot(n), log(n),
factorial(n)). In addition, equations can be rsEvals,
which are when the numbers in a sign are used in expressions that
evaluate to "special" numbers (e.g. an approximation of
Pi, Phi, 37, 42, state numbers, highway numbers, etc.).